Given　the　bottleneck　problems　of　the　domestic　RV　reducer,　such　as　low　bearing　capacity,　low　motion　accuracy,　and　short　service　life,　the　distribution　function　of　meshing　backlash　between　cycloid　gear　and　pin　gear　is　constructed　on　the　basis　of　the　characterization　method　of　the　cycloid　gear　surface　modification.　The　load　distribution　between　the　cycloid　gear　and　the　pin　gear　under　the　action　of　the　load　is　studied　systematically,　and　the　determination　method　of　the　maximum　meshing　force　between　the　cycloid　gear　and　the　pin　gear　is　proposed.　Combined　with　contact　strength　analysis　theory　and　multitooth　contact　load　analysis　theory　of　cycloid-pin　gear　drive,　the　bearing　capacity　evaluation　model　of　the　cycloid-pin　gear　transmission　mechanism　is　established.　In　addition,　the　influence　of　eccentricity　on　the　bearing　capacity　of　cycloid-pin　gear　transmission　is　explored.　Results　show　that　as　the　eccentricity　increases　within　a　certain　range,　the　bearing　capacity　coefficient　of　the　cycloid-pin　gear　increases　first　and　then　decreases,　reaching　the　highest　when　the　eccentricity　is　0.98　mm.　Ultimately,　its　accuracy　is　verified　through　finite　element　analysis.　©　2022,　Editorial　Department　of　Journal　of　HEU.　All　right　reserved.